diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2018-07-12 22:19:58 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-07-12 22:19:58 +0200 |
| commit | c6bb11147eb09bd39f316c6062455b88c905ab6e (patch) | |
| tree | 5a1a6ec2970daef5fa8546741ced3ef3924bf807 /kernel/time/time.c | |
| parent | ktime: Provide typesafe ktime_to_ns() (diff) | |
| parent | timekeeping: Update multiplier when NTP frequency is set directly (diff) | |
| download | linux-c6bb11147eb09bd39f316c6062455b88c905ab6e.tar.xz linux-c6bb11147eb09bd39f316c6062455b88c905ab6e.zip | |
Merge branch 'fortglx/4.19/time' of https://git.linaro.org/people/john.stultz/linux into timers/core
Pull timekeeping updates from John Stultz:
- Make the timekeeping update more precise when NTP frequency is set
directly by updating the multiplier.
- Adjust selftests
Diffstat (limited to 'kernel/time/time.c')
| -rw-r--r-- | kernel/time/time.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index 72caf051901c..ccdb351277ee 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -28,6 +28,7 @@ */ #include <linux/export.h> +#include <linux/kernel.h> #include <linux/timex.h> #include <linux/capability.h> #include <linux/timekeeper_internal.h> @@ -312,9 +313,10 @@ unsigned int jiffies_to_msecs(const unsigned long j) return (j + (HZ / MSEC_PER_SEC) - 1)/(HZ / MSEC_PER_SEC); #else # if BITS_PER_LONG == 32 - return (HZ_TO_MSEC_MUL32 * j) >> HZ_TO_MSEC_SHR32; + return (HZ_TO_MSEC_MUL32 * j + (1ULL << HZ_TO_MSEC_SHR32) - 1) >> + HZ_TO_MSEC_SHR32; # else - return (j * HZ_TO_MSEC_NUM) / HZ_TO_MSEC_DEN; + return DIV_ROUND_UP(j * HZ_TO_MSEC_NUM, HZ_TO_MSEC_DEN); # endif #endif } |